CHAPTER 01
1. Any meaningful quantitative laboratory result consists of:
(A) One component
(B) Two components
(C) Three components
(D) Four components
Ans B Diff Easy Page 74
2. The System International of the Units (SI), adopted internationally in ………., is preferred in scientific
literature and clinical laboratories and is the only system employed in many countries.
(A) 1959
(B) 1960
(C) 1961
(D) 1962
Ans D Diff Medium Page 74
3. ……... is the only basic unit that contains a prefix as part of its name.
(A) Kilogram
(B) Degree Celsius
(C) Katal
(D) Kilometer
Ans. A Diff Easy Page 78
4. The conversion of 5.3 mL to dL =…………..?
(A) 0.053 dL
(B) 0.0053 dL
(C) 0.53 dL
(D) 0.530 dL
Ans A Diff Hard Page 78
5. A …………… is a highly purified chemical that can be measured directly to produce a substance of exact
known concentration and purity.
(A) Primary Standard
(B) Organic Reagent
(C) Reference Material
(D) None of above
Ans A Diff Medium Page 81
6. Reverse osmosis is a process that uses pressure to force water through a semipermeable membrane,
producing water that reflects a filtered product of the original water.
(A) Osmosis
, (B) Reverse Oxidation
(C) Oxidation
(D) Reverse Osmosis
Ans D Diff Medium Page 83
7. Any chemical or biologic solution is described by its basic property of
(A) Concentration
(B) Solution
(C) Ionic Strength
(D) All of the above
Ans D Diff Medium Page 84
8. ……………. is expressed as the number of moles per 1 L of solution.
(A) Molarity
(B) Molality
(C) Percent Solution
(D) None of the above
Ans D Diff Hard Page 84
9. ……….. is the temperature at which the vapor pressure of the solvent reaches atmospheric pressure
(usually one atmosphere)?
(A) Boiling Point
(B) Freezing Point
(C) Melting Point
(D) Condensing Point
Ans A Diff Easy Page 86
10. Buffers are ………. and their related salts that, as a result of their dissociation characteristics, minimize
changes in the hydrogen ion concentration.
(A) Weak Acids
(B) Weak Bases
(C) Weak Acids or Bases
(D) Strong Acids or Basis
Ans C Diff Hard Page 87
11. . The predominant practice for temperature measurement uses the …….. scale.
(A) Celsius (°C)
(B) Fahrenheit (°F)
(C) Kelvin (°K)
(D) All of the above
, Ans A Diff Medium Page 89
12. How many grams are needed to make 1 L of a 2 M solution of HCl?
(A) 73 g
(B) 70 g
(C) 37 g
(D) 7 g
Ans A Diff Hard Page 116
13. A solution of NaOH is contained within a Class A 1-L volumetric flask filled to the calibration mark. The
content label reads 24 g of NaOH. Determine the molarity.
(A) 0.6 mol/L
(B) 0.006 mol/L
(C) 0.06 mol/L
(D) 60 mol/L
Ans A Diff Hard Page 116
14. The normality of a 500 mL solution containing 7 g of H2SO4 will be:
(A) 0.285 N
(B) 0.279 N
(C) 0.582 N
(D) 0.972 N
Ans A Diff Hard Page 118
15. The actual weight of a supply of concentrated HCl, whose label reads specific gravity 1.19 with an
assay value of 37% will be
(A) 0.44 gm/mL
(B) 0.40 gm/mL
(C) 0.45 gm/mL
(D) 0.43gm/mL
Ans A Diff Hard Page 120
16. Amniotic fluid is used to assess
(A) Lung maturity
(B) Congenital Diseases
(C) Genetic defects
(D) All of the above
Ans D Diff Medium Page 137
17. The ∆A per minute for an enzyme reaction is 0.250. The product measured has a molar absorptivity of
12.2 × 103 at 425 nm at 30°C. The incubation and reaction temperature are also kept at 30°C. The assay
calls for 1 mL of reagent and 0.050 mL of sample. The enzyme activity result will be equal to
, (A) 430 U
(B) 440 U
(C) 450 U
(D) 460 U
Ans A Diff Hard Page 134
18. The biuret protein assay is very stable and follows Beer's law. Rather than make up a completely new
standard graph, one standard (6 g/dL) was assayed. The absorbance of the standard was 0.400, and the
absorbance of the unknown was 0.350. Determine the value of the unknown in g/dL.
(A) 2.25 g/dL
(B) 3.25 g/dL
(C) 4.25 g/dL
(D) 5.25 g/dL
Ans D Diff Hard page 131
19. A procedure requires 0.9 g of CuSO4. All that is available is CuSO4 ·5H2O. What weight of CuSO4 ·5H2O
is needed?
(A) 1.41 g
(B) 1.31 g
(C) 1.21 g
(D) 1. 11 g
Ans A Diff Hard Page 129
20. A serial dilution may be defined as multiple progressive dilutions ranging from
(A) More concentrated solutions to less concentrated solutions
(B) Less concentrated solutions to more concentrated solutions
(C) Both of above
(D) None of above
Ans A Diff Medium Page 126
21. A 1:2 dilution of serum with saline had a creatinine result of 8.6 mg/dL. Calculate the actual serum
creatinine concentration.
(A) 17.2 mg/dL
(B) 17.1 mg/dL
(C) 17.0 mg/dL
(D) None of the above
Ans A Diff Hard Page 126
22. …….. Represents the ratio of concentrated or stock material to the total final volume of a solution and
consists of the volume or weight of the concentrate plus the volume of the diluent, with the
concentration units remaining the same.
1. Any meaningful quantitative laboratory result consists of:
(A) One component
(B) Two components
(C) Three components
(D) Four components
Ans B Diff Easy Page 74
2. The System International of the Units (SI), adopted internationally in ………., is preferred in scientific
literature and clinical laboratories and is the only system employed in many countries.
(A) 1959
(B) 1960
(C) 1961
(D) 1962
Ans D Diff Medium Page 74
3. ……... is the only basic unit that contains a prefix as part of its name.
(A) Kilogram
(B) Degree Celsius
(C) Katal
(D) Kilometer
Ans. A Diff Easy Page 78
4. The conversion of 5.3 mL to dL =…………..?
(A) 0.053 dL
(B) 0.0053 dL
(C) 0.53 dL
(D) 0.530 dL
Ans A Diff Hard Page 78
5. A …………… is a highly purified chemical that can be measured directly to produce a substance of exact
known concentration and purity.
(A) Primary Standard
(B) Organic Reagent
(C) Reference Material
(D) None of above
Ans A Diff Medium Page 81
6. Reverse osmosis is a process that uses pressure to force water through a semipermeable membrane,
producing water that reflects a filtered product of the original water.
(A) Osmosis
, (B) Reverse Oxidation
(C) Oxidation
(D) Reverse Osmosis
Ans D Diff Medium Page 83
7. Any chemical or biologic solution is described by its basic property of
(A) Concentration
(B) Solution
(C) Ionic Strength
(D) All of the above
Ans D Diff Medium Page 84
8. ……………. is expressed as the number of moles per 1 L of solution.
(A) Molarity
(B) Molality
(C) Percent Solution
(D) None of the above
Ans D Diff Hard Page 84
9. ……….. is the temperature at which the vapor pressure of the solvent reaches atmospheric pressure
(usually one atmosphere)?
(A) Boiling Point
(B) Freezing Point
(C) Melting Point
(D) Condensing Point
Ans A Diff Easy Page 86
10. Buffers are ………. and their related salts that, as a result of their dissociation characteristics, minimize
changes in the hydrogen ion concentration.
(A) Weak Acids
(B) Weak Bases
(C) Weak Acids or Bases
(D) Strong Acids or Basis
Ans C Diff Hard Page 87
11. . The predominant practice for temperature measurement uses the …….. scale.
(A) Celsius (°C)
(B) Fahrenheit (°F)
(C) Kelvin (°K)
(D) All of the above
, Ans A Diff Medium Page 89
12. How many grams are needed to make 1 L of a 2 M solution of HCl?
(A) 73 g
(B) 70 g
(C) 37 g
(D) 7 g
Ans A Diff Hard Page 116
13. A solution of NaOH is contained within a Class A 1-L volumetric flask filled to the calibration mark. The
content label reads 24 g of NaOH. Determine the molarity.
(A) 0.6 mol/L
(B) 0.006 mol/L
(C) 0.06 mol/L
(D) 60 mol/L
Ans A Diff Hard Page 116
14. The normality of a 500 mL solution containing 7 g of H2SO4 will be:
(A) 0.285 N
(B) 0.279 N
(C) 0.582 N
(D) 0.972 N
Ans A Diff Hard Page 118
15. The actual weight of a supply of concentrated HCl, whose label reads specific gravity 1.19 with an
assay value of 37% will be
(A) 0.44 gm/mL
(B) 0.40 gm/mL
(C) 0.45 gm/mL
(D) 0.43gm/mL
Ans A Diff Hard Page 120
16. Amniotic fluid is used to assess
(A) Lung maturity
(B) Congenital Diseases
(C) Genetic defects
(D) All of the above
Ans D Diff Medium Page 137
17. The ∆A per minute for an enzyme reaction is 0.250. The product measured has a molar absorptivity of
12.2 × 103 at 425 nm at 30°C. The incubation and reaction temperature are also kept at 30°C. The assay
calls for 1 mL of reagent and 0.050 mL of sample. The enzyme activity result will be equal to
, (A) 430 U
(B) 440 U
(C) 450 U
(D) 460 U
Ans A Diff Hard Page 134
18. The biuret protein assay is very stable and follows Beer's law. Rather than make up a completely new
standard graph, one standard (6 g/dL) was assayed. The absorbance of the standard was 0.400, and the
absorbance of the unknown was 0.350. Determine the value of the unknown in g/dL.
(A) 2.25 g/dL
(B) 3.25 g/dL
(C) 4.25 g/dL
(D) 5.25 g/dL
Ans D Diff Hard page 131
19. A procedure requires 0.9 g of CuSO4. All that is available is CuSO4 ·5H2O. What weight of CuSO4 ·5H2O
is needed?
(A) 1.41 g
(B) 1.31 g
(C) 1.21 g
(D) 1. 11 g
Ans A Diff Hard Page 129
20. A serial dilution may be defined as multiple progressive dilutions ranging from
(A) More concentrated solutions to less concentrated solutions
(B) Less concentrated solutions to more concentrated solutions
(C) Both of above
(D) None of above
Ans A Diff Medium Page 126
21. A 1:2 dilution of serum with saline had a creatinine result of 8.6 mg/dL. Calculate the actual serum
creatinine concentration.
(A) 17.2 mg/dL
(B) 17.1 mg/dL
(C) 17.0 mg/dL
(D) None of the above
Ans A Diff Hard Page 126
22. …….. Represents the ratio of concentrated or stock material to the total final volume of a solution and
consists of the volume or weight of the concentrate plus the volume of the diluent, with the
concentration units remaining the same.
